Cant help but feel that you should have credited my thread, pitching this exact idea, only a day before you. Your post qualifies as a "repost".
Original thread:
http://www.ownedcore.com/forums/worl...ml#post2489076 (Survive jumping out of Twin Peaks as Warlock)
Also: I think people are overestimating the severity of the bug. Ive tried things like accepting summons while falling down, getting a ride on a mount that was in the air and stuff like that as well, everything strips the buff. The only place you really do have the buff even to you should clearly NOT have it, is in these so called death zones, where you should die from jumping down.
Zoning removes the buff as well, and that pretty much limits the "death jump" places to burning crusade outdoor content, but then again, you will loose it as quickly as you accept a summon, so all you can do is walk around down on the ground.